The 400 Series Anti-Siphon Wall Hydrant was added to PRIER's offering with our 2007 purchase of Mansfield’s Brass Division.
The 400 Series is similar to Mansfield’s original patented vacuum breaker design, now manufactured by PRIER in our Kansas City area plant. The 400 Series provides year-round water to areas of structures that are prone to freezing, with the added protection of an anti-siphon device and backflow preventor. The hydrant valve is connected to the supply piping in the heated portion of the structure, eliminating the possibility of freezing. The valve is approved to ASSE, IAPMO and CSA standards.
The 400 Series is a “Smart-turn” design, 180 degree opening and closing, for easy operation and flow control.
The Mansfield 400 Series is available in sizes from 4” to 14”, in 2” increments.
PRIER's 400 Series hydrants are the current "half turn" lawn faucet with a vacuum breaker cap above the handle. This valve was originally the "Mansfield 578" hydrant (multi-turn) that was made by the Mansfield Plumbing Company in Perrysville Ohio. While PRIER has service parts for the original Mansfield 500 Series valve, it is no longer being made. The PRIER 400 Series lawn faucet (half turn) is now made by PRIER in our Grandview Missouri plant. It is a simple operating product and is fairly simple to repair.
Possible Repair Issues for the 400/500 Series Freezeless Wall Hydrant:
1. When the water is running, water leaks out from behind the handle [VIDEO]
This is a common maintenance occurrence for any packed valve of any brand or manufacture. It is overcome by simply tightening the plastic packing nut. The packing nut is a left hand or reverse threaded nut (older style hydrants may have a right hand threaded nut). This will force the packing tighter around the stem to eliminate leakage. Occasionally, the packing will need to be replaced if the packing nut has been repeatedly tightened.
The parts required for this are included in the Service Kit #630-7755.
2. The hydrant drips after shut off [VIDEO]
Since a Freezeless Hydrant actually shuts off inside the heated portion of the structure, the water inside the hydrant will drain out after shutoff. The shutoff point could be any distance from 4" to 14" inside the structure. This installation should also be pitched to allow the water to easily drain out of the hydrant. The hydrant may drip for up to 60 seconds after shutoff. If the water continues to drip after that time, you most likely need to replace the stem end bibb washers and 0-rings.
3. Water leaks from under the plastic cap on top of the valve [VIDEO]
The vacuum breaker has begun to leak. This happens when the plastic cap is ruptured by freezing, this often occurs when the hose is left on the valve, or the rubber seating surface needs to be replaced. This vacuum breaker threads out of the valve, and the replacement threads into the valve.
The parts required for this are included in #630-7500 Vacuum Breaker Replacement kit.
4. Water is leaking from the hydrant inside my house
Unfortunately, your Freezeless Hydrant is broken, most likely beyond repair. This happens when the water cannot drain out of the Freezeless Hydrant, it freezes, expands and ruptures the copper shaft of the Freezeless Hydrant inside the structure. The most common reasons for this problem is that the garden hose was left attached to the hydrant during freezing weather, or the hydrant was not installed with the proper drainage pitch.
DO NOT OPERATE THE HYDRANT IF THIS IS OCCURRING!
Since the Hydrant shuts off inside the house, if it stays in the off position you will not get water inside the structure. IT IS A GOOD IDEA TO REMOVE THE HANDLE TO PREVENT ACCIDENTAL OPERATION UNTIL THE PROBLEM IS REPAIRED BY YOUR PLUMBER!
5. The handle is missing from my hydrant
For any one of numerous reasons, your handle may be missing. Prier's Mansfield Style handle is unique to the Mansfield Style products. This style handle mates perfectly with our stem-end for a snug fit and years of reliable operation.
The required part number is #630-7965.
6. The stem end is damaged and you cannot operate the freezeless hydrant
Occasionally the stem of the Prier Mansfield Style Freezeless Hydrant gets damaged beyond repair. This is most commonly caused by the hydrant being operated by pliers and damaging the brass on the end. To determine the proper replacement stem, you need to determine the length of the stem, from brass tip to brass tip. This will give you the Overall Length (OAL) of the stem. Also, to determine if you have a 400 Series or the Obsolete 500 Series, you will need to know if you have a full turn handle (rotates 360 degrees several times to have the water all the way on) or a half turn handle (rotates just 180 degrees or half a turn to have the water all the way on). The 400 Series has a half-turn handle and the 500 Series has a full turn handle. (picture of half turn with disc and arrow depicting half a turn and full turn without disc and arrow depicting 360 degree turn)
To determine the proper replacement stem, you need to determine the following:
1. Length of the stem, from brass tip to brass tip.
2. Using the acquired dimensions, determine which stem is required from the chart below:
Stem for 4" 400 Series ~ 8" Overall Length
Stem for 6" 400 Series ~ 10" Overall Length
Stem for 8" 400 Series ~ 12" Overall Length
Stem for 10" 400 Series ~ 14" Overall Length
Stem for 12" 400 Series ~ 16" Overall Length
Stem for 14" 400 Series ~ 18" Overall Length
Stem for 4" 500 Series ~ 8" Overall Length
Stem for 6" 500 Series ~ 10" Overall Length
Stem for 8" 500 Series ~ 12" Overall Length
Stem for 10" 500 Series ~ 14" Overall Length
Stem for 12" 500 Series ~ 16" Overall Length
Stem for 14" 500 Series ~ 18" Overall Length
7. The spring (seat) end is damaged and you cannot operate the freezeless hydrant
The stems for the 400 and 500 Series are spring loaded at the seat end. You should be able to easily push in the end and it should immediately pop back out. If the spring end is stuck, your hydrant will not open and close properly. You will need to replace the stem. To determine the proper replacement stem, you need to determine the length of the stem, from brass tip to brass tip. This will give you the Overall Length (OAL) of the stem. Also, to determine if you have a 400 Series or the Obsolete 500 Series, you will need to know if you have a full turn handle (rotates 360 degrees several times to have the water all the way on) or a half turn handle (rotates just 180 degrees or half a turn to have the water all the way on). The 400 Series has a half-turn handle and the 500 Series has a full turn handle. (picture of half turn with disc and arrow depicting half a turn and full turn without disc & arrow depicting 360 degree turn)
8. I need a complete rebuild kit
The 400/500 Series Mansfield Style wall hydrants have the following repair kits:
#630-7755 Service Kit
#630-7965 Replacement Handle Kit
#630-7500 Vacuum Breaker Repair Kit
9. How do I assemble parts on the stem?
All wearable parts on the stem are available in service kit # 630-7755.